Magnetic anisotropy and phohotoluminescence properties of amorphous CexFeyOn nanowire arrays

2021 ◽  
pp. 2151016
Author(s):  
Fangkuo Wang ◽  
Xiao-You Yuan
Keyword(s):  
Magnetic Anisotropy ◽  
Emission Intensity ◽  
Anodic Aluminum Oxide ◽  
Fluorescence Spectra ◽  
Nanowire Arrays ◽  
Aao Template ◽  
Anodic Aluminum ◽  
Regular Change ◽  
Axis Parallel ◽  
Co Precipitation

Amorphous Ce[Formula: see text]Fe[Formula: see text]O[Formula: see text] nanowire arrays with diameters about 100 nm were fabricated in porous anodic aluminum oxide (AAO) template channels by chemical co-precipitation assisted by suction filtration. Ce[Formula: see text]Fe[Formula: see text]O[Formula: see text] nanowire arrays have distinct magnetic anisotropy behavior, and the axis parallel to the nanowire is magnetically “easy.” The magnetic properties of Ce[Formula: see text]Mn[Formula: see text]O[Formula: see text] and Ce[Formula: see text]Fe[Formula: see text]Mn[Formula: see text]O[Formula: see text] nanowire arrays were investigated to compare with Ce[Formula: see text]Fe[Formula: see text]O[Formula: see text] nanowire arrays. The fluorescence spectra of Ce[Formula: see text]Fe[Formula: see text]O[Formula: see text] nanowires arrays mixed with Eu, Tb, Sm showed that their emission intensity displays regular change with the increase of the mole fraction of mixture. The emission intensity reached maximum with increasing of Eu or Sm-mixing from 2 mol% to 10 mol% at 591 nm, 709 nm or 607 nm, then decreased gradually. However, there is no obvious influence to fluorescence of Tb mixed Ce[Formula: see text]Fe[Formula: see text]O[Formula: see text] nanowire arrays, only one visible weak emission peak is present at 486 nm.

Morphological and Magnetic Properties of Electrodeposited Ni-Ag Alloy Nanowire Arrays in Modified AAO Template

2014 ◽  
Vol 875-877 ◽  
pp. 14-17 ◽  
Author(s):  
Wei Zheng Shang ◽  
Wei Guo Zhang ◽  
Hong Zhi Wang
Keyword(s):  
Electron Microscopy ◽  
Anodic Aluminum Oxide ◽  
Magnetic Hysteresis ◽  
Magnetic Hysteresis Loop ◽  
Atomic Ratio ◽  
Nanowire Arrays ◽  
Aao Template ◽  
Anodic Aluminum ◽  
Transmission Electron ◽  
Potential Applications

Highly ordered Ni-Ag alloy nanowire arrays have been fabricated successfully by electrodeposition into the pores of anodic aluminum oxide (AAO). This template was prepared with modified two-step anodizing method. The scanning and transmission electron microscopy were utilized to characterize the Ni-Ag alloy nanowire arrays. The results revealed that the nanowire arrays were regularly arranged, about 90nm in diameter and 30µm in length. The nanowires were single crystal and the atomic ratio of Ni and Ag is very close to 79:21. Magnetic hysteresis loop showed that Ni-Ag alloy nanowire arrays embedded in AAO have superparamagnetism, indicating their potential applications in biomedical materials.

Direct Electrodeposition of Highly Ordered Au-Cu Alloy Nanowire Arrays

2013 ◽  
Vol 652-654 ◽  
pp. 155-158
Author(s):  
Wei Zhang ◽  
Xin Min Huang ◽  
Yong Jiu Zhao ◽  
Yu Cheng Wu ◽  
Guang Qing Xu ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Acidic Medium ◽  
Anodic Aluminum Oxide ◽  
Nanowire Arrays ◽  
Aao Template ◽  
Anodic Aluminum ◽  
Cu Alloy ◽  
Alloy Nanowires ◽  
Direct Electrodeposition ◽  
Oxidation Of Ethanol

Au-Cu alloy nanowires with diameters 50-100nm and lengths of 500nm have been obtained by direct electrochemical deposition.The fabrication of highly ordered Au-Cu alloy nanowires arrays was used as a Anodic aluminum oxide (AAO) template. This template was fabricated with two-step anodizing method. In this paper, we report electrochemical deposition fabrication of Au–Cu alloy nanowire arrays by AAO. Use SEM, TEM can detect morphology of Au-Cu alloy nanowires, And use EDS to analyse the elements.The electrocatalytic activities of the Au-Cu alloy nanowires for the oxidation of ethanol in acidic medium were investigated by cyclic voltammetry.

Tellurium nanowire arrays synthesized by electrochemical and electrophoretic deposition

2003 ◽  
Vol 18 (10) ◽  
pp. 2318-2322 ◽  
Author(s):  
A. W. Zhao ◽  
C. H. Ye ◽  
G. W. Meng ◽  
L. D. Zhang ◽  
P. M. Ajayan
Keyword(s):  
Electrochemical Deposition ◽  
Electrophoretic Deposition ◽  
Anodic Aluminum Oxide ◽  
Longitudinal Axis ◽  
Nanowire Arrays ◽  
Aao Template ◽  
Single Crystalline ◽  
Anodic Aluminum ◽  
Inorganic Nanowires ◽  
Polycrystalline Structures

This article describes both electrochemical deposition and electrophoretic deposition of high-density tellurium (Te) nanowire arrays with wire diameters of 60 nm and lengths of 15–20 μm in the nanochannels of anodic aluminum oxide (AAO) templates. The Te nanowires synthesized via electrochemical deposition (ECD) are generally single crystalline in nature with the wire longitudinal axis along the [001] direction, whereas those synthesized via electrophoretic deposition (EPD) show polycrystalline structures with numerous tiny Te crystallites packed randomly in the wires. The single-crystalline Te nanowires produced by the ECD route are believed to form under a near chemical equilibrium condition; however, the imposed transport and the rapid packing of Te nanocrystallites in the nanochannels of AAO template in external fields lead to polycrystalline Te nanowires in the EPD process. This comparative study of the Te nanowire formation in the nanochannels of AAO template will facilitate the tailoring of the growth of other inorganic nanowires of high quality.

Control of Crystal Orientation of Epitaxial Si nanowires on Si Substrate Using AAO template

2011 ◽  
Vol 1350 ◽  
Author(s):  
Tomohiro Shimizu ◽  
Qi Wang ◽  
Chonge Wang ◽  
Fumihiro Inoue ◽  
Makoto Koto ◽  
...  
Keyword(s):  
Crystal Orientation ◽  
Growth Direction ◽  
Nanowire Arrays ◽  
Si Nanowires ◽  
Aao Template ◽  
Si Substrate ◽  
Anodic Aluminum ◽  
Transmission Electron ◽  
Growth Method ◽  
Vls Growth

ABSTRACTControl of crystal orientation of vertically grown epitaxial Si (111) and (110) nanowire arrays on Si substrate has been demonstrated using a combination of an anodic aluminum oxide (AAO) template and vapor – liquid – solid (VLS) growth method. The crystal orientation of the nanowire was investigated by transmission electron microscopy. A growth direction of the nanowire arrays was guided perpendicular to the surface of the substrate by the AAO template, and the crystal orientation of the nanowire arrays was selected using the single crystal Si substrate properly cut in desired orientation.

Template Synthesis of Indium Nanowires Using Anodic Aluminum Oxide Membranes

2008 ◽  
Vol 8 (9) ◽  
pp. 4488-4493 ◽  
Author(s):  
Feng Chen ◽  
Adrian H. Kitai
Keyword(s):  
Aluminum Oxide ◽  
Template Synthesis ◽  
Anodic Aluminum Oxide ◽  
Preferred Orientation ◽  
Hydraulic Pressure ◽  
X Ray Diffraction ◽  
Aao Template ◽  
X Ray ◽  
Anodic Aluminum ◽  
Oxide Membranes

Indium nanowires with diameters approximately 300 nm have been synthesized by a hydraulic pressure technique using anodic aluminum oxide (AAO) templates. The indium melt is injected into the AAO template and solidified to form nanostructures. The nanowires are dense, continuous and uniformly run through the entire ∼60 μm thickness of the AAO template. X-ray diffraction (XRD) reveals that the nanowires are polycrystalline with a preferred orientation. SEM is performed to characterize the morphology of the nanowires.

High Density Silver Nanowire Arrays using Self-ordered Anodic Aluminum Oxide(AAO) Membrane

2008 ◽  
Vol 45 (4) ◽  
pp. 191-195 ◽  
Author(s):  
Yong-Hyun Kim ◽  
Young-Hwan Han ◽  
Hyung-Jik Lee ◽  
Hyung-Bock Lee
Keyword(s):  
Aluminum Oxide ◽  
Anodic Aluminum Oxide ◽  
High Density ◽  
Silver Nanowire ◽  
Nanowire Arrays ◽  
Anodic Aluminum

Controlled Growth of Carbon Spheres by Chemical Vapor Deposition Based on Anodic Aluminum Oxide Nano-Template

2012 ◽  
Vol 184-185 ◽  
pp. 924-927
Author(s):  
Lei Shan Chen ◽  
Cun Jing Wang ◽  
Gai Rong Chen
Keyword(s):  
Electron Microscopy ◽  
Vapor Deposition ◽  
Anodic Aluminum Oxide ◽  
Chemical Vapor ◽  
Average Diameter ◽  
Carbon Spheres ◽  
Aao Template ◽  
Graphene Layers ◽  
Anodic Aluminum ◽  
Transmission Electron

The reactions were carried out by decomposing acetylene at 1000 °C in a two-stage furnace system for 10 min. In the first furnace no catalyst was placed and an AAO template with the average diameter about 50 nm was placed in the second furnace whose temperature was designed to be 500 °C, 600 °C and 700 °C. The samples were characterized by scanning electron microscopy and high resolution transmission electron microscopy. The results show that carbon spheres with average diameter about 50 nm on the AAO template surface were obtained when the temperature of the second furnace was designed to be 700 °C. These carbon spheres are composed of unclosed graphene layers with an interlayer distance of 0.33–0.35 nm between the layers.

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